<?php
// +----------------------------------------------------------------------
// | Chat 消息处理类（参照熙思研模式：在 WS handler 内直接保存聊天记录）
// +----------------------------------------------------------------------
namespace app\services\workerman\chat;

use app\model\api\ChatRecord;
use app\model\api\ChatUserRelation;
use app\model\api\User;
use app\services\workerman\Response;
use Workerman\Connection\TcpConnection;

class ChatHandle
{
    protected $service;

    public function __construct(ChatService &$service)
    {
        $this->service = &$service;
    }

    /**
     * 客服登录
     */
    public function kefu_login(TcpConnection &$connection, array $res, Response $response)
    {
        if (!isset($res['data']) || !$token = $res['data']) {
            return $response->close(['msg' => '授权失败!']);
        }

        // TODO: 根据你的系统实现客服token验证
        $kefuInfo = [
            'uid' => $res['data']['uid'] ?? 1,
            'name' => $res['data']['name'] ?? '客服',
        ];

        $connection->kefuUser = (object)$kefuInfo;
        $connection->user = (object)['uid' => $kefuInfo['uid'], 'nickname' => $kefuInfo['name'] ?? '客服'];
        $this->service->setKefuUser($connection);

        return $response->success();
    }

    /**
     * 用户登录
     */
    public function login(TcpConnection &$connection, array $res, Response $response)
    {
        if (!isset($res['data']) || !$token = $res['data']) {
            return $response->close(['msg' => '授权失败!']);
        }

        // 通过 token 查询用户
        $userInfo = User::where('token', $token)->find();
        if (!$userInfo) {
            return $response->close(['msg' => '用户不存在']);
        }

        $connection->user = (object)$userInfo->toArray();
        $connection->chatToUid = $connection->to_uid ?? 0;
        $this->service->setUser($connection);

        return $response->success([
            'msg' => '登录成功',
            'to_uid' => $connection->chatToUid,
        ]);
    }

    /**
     * 用户切换到与某人聊天（参照熙思研 to_chat）
     * 前端打开某用户聊天窗口时调用，用于标记消息已读、重置未读数
     */
    public function to_chat(TcpConnection &$connection, array $res, Response $response)
    {
        $to_uid = $res['data']['id'] ?? $res['data']['to_uid'] ?? 0;
        $connection->chatToUid = $to_uid;

        if (isset($connection->user) && $connection->chatToUid) {
            $uid = $connection->user->uid;
            // 标记对方发给我的消息为已读
            ChatRecord::markAsRead($uid, $connection->chatToUid);
            $response->send('mssage_num', [
                'uid' => $connection->chatToUid,
                'num' => 0,
                'recored' => (object)[],
            ]);
        }
    }

    /**
     * 发送消息（参照熙思研模式：在 WS handler 内直接保存聊天记录到数据库）
     */
    public function chat(TcpConnection &$connection, array $res, Response $response)
    {
        if (!isset($connection->user) || !$connection->user) {
            return $response->send('err_tip', ['msg' => '请先登录']);
        }

        $to_uid = $res['data']['to_uid'] ?? $connection->chatToUid ?? 0;
        $msn_type = $res['data']['type'] ?? ChatRecord::TYPE_TEXT;
        $msn = $res['data']['msn'] ?? '';
        $form_type = $res['form_type'] ?? $connection->form_type ?? ChatRecord::FROM_PC;
        $uid = $connection->user->uid ?? 0;

        if (!$to_uid) {
            return $response->send('err_tip', ['msg' => '用户不存在']);
        }
        if ($to_uid == $uid) {
            return $response->send('err_tip', ['msg' => '不能和自己聊天']);
        }
        if (!in_array($msn_type, [ChatRecord::TYPE_TEXT, ChatRecord::TYPE_VOICE, ChatRecord::TYPE_IMAGE])) {
            return $response->send('err_tip', ['msg' => '格式错误']);
        }

        // 清洗消息内容
        $msn = trim(strip_tags(str_replace(["\n", "\t", "\r", "&nbsp;"], '', htmlspecialchars_decode($msn))));

        // 判断对方是否在线且正在与当前用户聊天
        $connections = $this->service->user();
        $online = isset($connections[$to_uid]) && isset($connections[$to_uid]->chatToUid) && $connections[$to_uid]->chatToUid == $uid;

        // ========== 关键：在 WS handler 内直接保存聊天记录 ==========
        $record = ChatRecord::saveRecord($uid, $to_uid, $msn, $msn_type, $form_type);

        // 如果对方在线且正在聊天，直接标记已读
        if ($online) {
            ChatRecord::where('id', $record->id)->update(['is_read' => ChatRecord::READ]);
            $record->is_read = ChatRecord::READ;
        }

        // 更新会话关系
        $relation = ChatUserRelation::getOrCreate($uid, $to_uid);
        if ($relation) {
            $relation->update_time = time();
            $relation->save();
        }

        // 获取发送者用户信息
        $user = User::find($uid);
        $nickname = $user->nickname ?? $connection->user->nickname ?? '用户';
        $avatar = $user->avatar ?? $connection->user->avatar ?? '';

        // 未读消息计数
        $unreadCount = ChatRecord::getUnreadCount($to_uid, $uid);

        // 构造返回数据
        $data = [
            'record_id'    => $record->id,
            'user_id'      => $uid,
            'to_user_id'   => $to_uid,
            'content'      => $msn,
            'type'         => $msn_type,
            'type_text'    => ChatRecord::getTypeText($msn_type),
            'form_type'    => $form_type,
            'is_read'      => $online ? ChatRecord::READ : ChatRecord::UNREAD,
            'create_time'  => $record->create_time,
            'nickname'     => $nickname,
            'avatar'       => $avatar,
        ];

        // 给自己回复
        $response->send('chat', $data);

        // 发送给对方
        if ($online) {
            // 对方在线且正在聊天：直接推送消息
            $replyData = $data;
            $replyData['is_read'] = ChatRecord::READ;
            $response->connection($this->service->user()[$to_uid])->send('reply', $replyData);
        } elseif (isset($connections[$to_uid])) {
            // 对方在线但没在聊天：推送未读消息提醒
            $response->connection($this->service->user()[$to_uid])->send('mssage_num', [
                'uid' => $uid,
                'num' => $unreadCount,
                'recored' => [
                    'nickname' => $nickname,
                    'avatar'   => $avatar,
                ],
            ]);
        }
        // 对方不在线：什么都不做，等对方上线后通过 HTTP API 拉取
    }
}